910 バイオセラミックスの擬似生体環境下における接触疲労挙動

概要

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In recent years, the necessity of biomaterials has been increased more and more with an ageing society. Biomaterials mean the materials specially designed for the repair, reconstruction, and replacement of diseased or damaged part of human-body. Alumina is considered as a candidate material for bio-ceramics, because of its superior strength characteristics, corrosion resistance and bio-inert properties. In this study, the effects of human body environment upon contact fatigue behavior of alumina have been investigated by electro hydraulic control fatigue testing. Test specimens were polycrystalline aluminas that were used for artificial joint and so on. As the specimen aluminas was used, which have two different purity, that is , 99.7% and 99.9%, and sintered at 1600℃. Contact impression damaged morphologies and fracture surfaces of alumina specimens were mainly examined in detail by FE-SEM. As a result, the dimension of polycrystalline alumina contact impression trace was found to be larger in quasi-human body liquid solution (lactated ringer's solution) compared with that in air.
社団法人日本機械学会の論文
2002-10-10